The oxidation states of the two metal sites are essentially equivalent.

Slightly different but essentially equivalent definitions are used by different authors.

A manager is essentially equivalent to the head coach in other North American professional sports leagues.

It is essentially equivalent to a table of values of the sine function.

There are several different but essentially equivalent ways to treat urelements in a first-order theory.

The measure is essentially equivalent to the Simpson diversity index used in ecology.

In this respect it is essentially equivalent to real and complex algebraic geometry.

There are at least two different, but essentially equivalent, ways to define spinors abstractly.

These degrees indicate that a students has completed a course study essentially equivalent to the first two years of a baccalaureate degree.

But, if the mirror-image division was essentially equivalent, the electorates were not.